Bugzilla

Crash in `TF_Notify` with `epclient64.dll` from Citrix Workspace by Citrix Systems (`C:\Program Files (x86)\Citrix\ICA Client\epclient64.dll`).

Example crash report: [here](https://crash-stats.mozilla.org/report/index/2b4764b3-b4dc-4eef-84d2-3f5f80230929)

This is the same crashing instruction as bug 1777960 (ZoneAlarm Anti-Keylogger), and also from Windows 11 22H2 users. Starting with Windows 11 22H2, Microsoft has made internal changes in `msctf.dll`. The `TF_Notify` function, also known as `CtfImmNotify` from `imm32.dll`, uses a new convention for its third argument. These changes would be incompatible with current versions of Citrix Workspace, resulting in crashes in our main process. This is presumably linked to [their anti-keylogger feature](https://docs.citrix.com/en-us/citrix-workspace-app/app-protection.html).

This is should be very impacting for the affected users as it presumably makes they crash as soon as they type. I will forward the information we have to Citrix Systems.

Crash in `TF_Notify` with `epclient64.dll` from Citrix Workspace by Citrix Systems (`C:\Program Files (x86)\Citrix\ICA Client\epclient64.dll`).

Example crash report: [here](https://crash-stats.mozilla.org/report/index/2b4764b3-b4dc-4eef-84d2-3f5f80230929)

This is the same crashing instruction as bug 1777960 (ZoneAlarm Anti-Keylogger), and also from Windows 11 22H2 users. Starting with Windows 11 22H2, Microsoft has made internal changes in `msctf.dll`. The `TF_Notify` function, also known as `CtfImmNotify` from `imm32.dll`, uses a new convention for its third argument. These changes would be incompatible with current versions of Citrix Workspace, resulting in crashes in the Firefox main process. This is presumably linked to [their anti-keylogger feature](https://docs.citrix.com/en-us/citrix-workspace-app/app-protection.html).

This is should be very impacting for the affected users as it presumably makes they crash as soon as they type. I will forward the information we have to Citrix Systems.